# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

function hadoop_subproject_init
{
  
  # at some point in time, someone thought it would be a good idea to
  # create separate vars for every subproject.  *sigh*
  # let's perform some overrides and setup some defaults for bw compat
  # this way the common hadoop var's == subproject vars and can be
  # used interchangeable from here on out
  # ...
  # this should get deprecated at some point.
  
  if [[ -z "${HADOOP_YARN_ENV_PROCESSED}" ]]; then
    if [[ -e "${YARN_CONF_DIR}/yarn-env.sh" ]]; then
      . "${YARN_CONF_DIR}/yarn-env.sh"
    elif [[ -e "${HADOOP_CONF_DIR}/yarn-env.sh" ]]; then
      . "${HADOOP_CONF_DIR}/yarn-env.sh"
    fi
    export HADOOP_YARN_ENV_PROCESSED=true
  fi
  
  if [[ -n "${YARN_CONF_DIR}" ]]; then
    HADOOP_CONF_DIR="${YARN_CONF_DIR}"
  fi
  
  YARN_CONF_DIR="${HADOOP_CONF_DIR}"
  
  # YARN_CONF_DIR needs precedence over HADOOP_CONF_DIR
  # and the various jar dirs
  hadoop_add_classpath "${YARN_CONF_DIR}" before
  
  HADOOP_LOG_DIR="${YARN_LOG_DIR:-$HADOOP_LOG_DIR}"
  YARN_LOG_DIR="${HADOOP_LOG_DIR}"
  
  HADOOP_LOGFILE="${YARN_LOGFILE:-$HADOOP_LOGFILE}"
  YARN_LOGFILE="${HADOOP_LOGFILE}"
  
  HADOOP_NICENESS="${YARN_NICENESS:-$HADOOP_NICENESS}"
  YARN_NICENESS="${HADOOP_NICENESS}"
  
  HADOOP_STOP_TIMEOUT="${YARN_STOP_TIMEOUT:-$HADOOP_STOP_TIMEOUT}"
  YARN_STOP_TIMEOUT="${HADOOP_STOP_TIMEOUT}"
  
  HADOOP_PID_DIR="${YARN_PID_DIR:-$HADOOP_PID_DIR}"
  YARN_PID_DIR="${HADOOP_PID_DIR}"
  
  HADOOP_ROOT_LOGGER="${YARN_ROOT_LOGGER:-${HADOOP_LOGLEVEL},console}"
  YARN_ROOT_LOGGER="${HADOOP_ROOT_LOGGER}"
  
  HADOOP_YARN_HOME="${HADOOP_YARN_HOME:-$HADOOP_PREFIX}"
  
  HADOOP_IDENT_STRING="${YARN_IDENT_STRING:-$HADOOP_IDENT_STRING}"
  YARN_IDENT_STRING="${HADOOP_IDENT_STRING}"
  
  YARN_OPTS="${YARN_OPTS:-$HADOOP_OPTS}"
  
  # YARN-1429 added the completely superfluous YARN_USER_CLASSPATH
  # env var.  We're going to override HADOOP_USER_CLASSPATH to keep
  # consistency with the rest of the duplicate/useless env vars
  HADOOP_USER_CLASSPATH="${YARN_USER_CLASSPATH:-$HADOOP_USER_CLASSPATH}"
  YARN_USER_CLASSPATH="${HADOOP_USER_CLASSPATH}"
  
  HADOOP_USER_CLASSPATH_FIRST="${YARN_USER_CLASSPATH_FIRST:-$HADOOP_USER_CLASSPATH_FIRST}"
  YARN_USER_CLASSPATH_FIRST="${HADOOP_USER_CLASSPATH_FIRST}"
}

if [[ -z "${HADOOP_LIBEXEC_DIR}" ]]; then
  _yc_this="${BASH_SOURCE-$0}"
  HADOOP_LIBEXEC_DIR=$(cd -P -- "$(dirname -- "${_yc_this}")" >/dev/null && pwd -P)
fi

if [[ -n "${HADOOP_COMMON_HOME}" ]] &&
   [[ -e "${HADOOP_COMMON_HOME}/libexec/hadoop-config.sh" ]]; then
  . "${HADOOP_COMMON_HOME}/libexec/hadoop-config.sh"
elif [[ -e "${HADOOP_LIBEXEC_DIR}/hadoop-config.sh" ]]; then
  . "${HADOOP_LIBEXEC_DIR}/hadoop-config.sh"
elif [ -e "${HADOOP_PREFIX}/libexec/hadoop-config.sh" ]; then
  . "${HADOOP_PREFIX}/libexec/hadoop-config.sh"
else
  echo "ERROR: Hadoop common not found." 2>&1
  exit 1
fi